/ Dictionary / Index D dual personality: Meaning and Definition of Find definitions for: du'al personal'ity Pronunciation: [key] — Psychol. Psychol. a disorder in which an individual possesses two dissociated personalities. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dual nationality dual-purpose Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language